X-Git-Url: http://git.tdb.fi/?a=blobdiff_plain;f=source%2Ftime%2Ftimedelta.h;h=a3e62f161c33684f13b90444e23b40fda02567f4;hb=99b9121e2158603372c7313400283b622e6754d8;hp=9be491ecbc762bf02046628274d0e6bb91ba445d;hpb=132c0c3cc3fd743943f8b076a122bb052aaf9635;p=libs%2Fcore.git

diff --git a/source/time/timedelta.h b/source/time/timedelta.h
index 9be491e..a3e62f1 100644
--- a/source/time/timedelta.h
+++ b/source/time/timedelta.h
@@ -1,6 +1,7 @@
 #ifndef MSP_TIME_TIMEDELTA_H_
 #define MSP_TIME_TIMEDELTA_H_
 
+#include <cstdlib>
 #include <ctime>
 #include <msp/strings/lexicalcast.h>
 #include "rawtime.h"
@@ -14,15 +15,14 @@ Represents a quantity of time, such as five seconds.
 class TimeDelta
 {
 private:
-	RawTime usec;
+	RawTime usec = 0;
 
 public:
 	/** Constructs a zero TimeDelta. */
-	TimeDelta(): usec(0) { }
+	TimeDelta() = default;
 
 	/** Constructs a TimeDelta from a plain number.  The purpose of this is to
-	allow serialization together with the raw() function.  For creating
-	TimeDeltas with a specific length, see units.h. */
+	allow serialization together with the raw() function. */
 	explicit TimeDelta(RawTime u): usec(u) { }
 
 	/** Returns the raw number stored inside the TimeDelta.  This should only be used
@@ -33,6 +33,7 @@ public:
 	TimeDelta &operator+=(const TimeDelta &t) { usec += t.usec; return *this; }
 	TimeDelta operator-(const TimeDelta &t) const { return TimeDelta(usec-t.usec); }
 	TimeDelta &operator-=(const TimeDelta &t) { usec -= t.usec; return *this; }
+	TimeDelta operator-() const { return TimeDelta(-usec); }
 
 	template<typename T>
 	TimeDelta operator*(T a) const { return TimeDelta(RawTime(usec*a)); }
@@ -72,6 +73,9 @@ extern const TimeDelta hour;
 extern const TimeDelta day;
 extern const TimeDelta week;
 
+inline TimeDelta abs(const TimeDelta &t) { return t>=zero ? t : -t; }
+using std::abs;
+
 } // namespace Time
 } // namespace Msp